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|標題:||Aluminium metal complexes supported by amine bis-phenolate ligands as catalysts for ring-opening polymerization of epsilon-caprolactone||作者:||Chen, C.T.
|關鍵字:||immortal polymerization;1-hexene polymerization;coordination;chemistry;zirconium complexes;titanium complexes;cyclic esters;alkoxides;lithium;lactide;donor||Project:||Dalton Transactions||期刊/報告no：:||Dalton Transactions, Issue 19, Page(s) 3799-3803.||摘要:||
A family of aluminium complexes supported by dianionic amine bis(phenolate) ligands are described. Treatment of ligand precursors H2O2NNPy or H2O2NNMe [H2O2NNPy = (2-C5H4N)CH2N(CH2-2-HO-3,5-C6H2(Bu-t)(2))(2); H2O2NNMe = Me2NCH2CH2N(CH2-2-HO-3,5-C6H2(Bu-t)(2))(2)] with 1.1 molar equivalent of AlMe3 in toluene affords MeAl(O2NNPy) (1) and MeAl(O2NNMe) (2) as five-coordinate aluminium methyl complexes, which further react with one equivalent of benzyl alcohol affording (C6H5CH2O)Al(O2NNPy) (3) and (C6H5CH2O)Al(O2NNMe) (4) as five-coordinate aluminium benzyloxy complexes. The molecular structures are reported for compounds 1 and 4. Compounds 3 and 4 show excellent catalytic activity toward the ring-opening polymerization of epsilon-caprolactone.
|Appears in Collections:||化學系所|
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